Heavy-duty pivot plate adjusting joint

Abstract

A heavy-duty pivot plate adjusting joint for railroad freight cars connects multi-part car sections. To this end, the adjusting joint is configured such that each drawbar end is provided with only one end coupling rod part having a spring column, and the drawbar is connected by way of the drawbar end plates to the support bearing plates of an under frame provided on a car side. Each adjusting joint is provided with an adjusting point pivot plate, wherein a pivot plate roll surface is present directly at the pivot plate or at the adjoining contact surfaces transmitting pressure force, the surfaces having a spherical or two-dimensional shape. A configuration of the adjusting joints in a “regular embodiment” is proposed, wherein the distance of the transmission end points of balance is smaller than the distance of the spring travel limiters.

The invention claimed is: 
     
       1. A heavy-duty pivot plate adjusting joint for a heavily loaded drawbar for connecting railroad cars to multi-part car sections and for generating horizontal and/or vertical restoring torques in car bodies during a development of longitudinal pressure forces in a block train to avoid derailing and consequences thereof, the heavy-duty pivot plate adjusting joint comprising:
 a drawbar end plate; 
 an end coupling rod part disposed at an end of the drawbar; 
 a pressure-side spring washer disposed at least on a pressure side; 
 a car-side support bearing plate for connecting to an under frame of a railroad car; 
 only one pressure-side spring column, at a drawbar end of the drawbar just one said end coupling rod part is disposed with said only one pressure-side spring column in such a way as to connect the drawbar to said car-side support bearing plate via said drawbar end plate; 
 an adjusting joint pivot plate disposed between said drawbar end plate and said car-side support bearing plate; 
 said drawbar end plate, said adjusting joint pivot plate and said car-side support bearing plate having contact faces, at least one of said contact faces defining a pivot plate rolling face for transmitting a pressure force, between one of said adjusting joint pivot plate and the drawbar or said car side support bearing plate; and 
 spring travel limiters having pressure contact faces disposed either on said drawbar end plate, on said adjusting joint pivot plate, or on said car-side support bearing plate, and define a support-cage-shaped space for receiving said pressure-side spring washer, and are at a defined distance from an assigned one of said pressure contact faces, transmitting the pressure force, in a direction of a pressure-side spring travel. 
 
     
     
       2. The heavy-duty pivot plate adjusting joint according to  claim 1 , wherein said pivot plate rolling face has, for a purpose of moving a longitudinal-pressure-transmitting point in a case of pivoting movements, a surface which is spherical or shaped in two dimensions for a vertical and/or horizontal adjusting joint restoring effect. 
     
     
       3. The heavy-duty pivot plate adjusting joint according to  claim 1 , wherein a distance between transmitting end tilting points is shorter than a distance between said spring travel limiters with said pressure contact faces. 
     
     
       4. The heavy-duty pivot plate adjusting joint according to  claim 1 , wherein for increasing an effective restoring torque of the heavy-duty pivot plate adjusting joint, a distance between transmitting end tilting points is equal to or slightly larger than a distance of said spring travel limiters with said pressure contact faces.